From my experience, if you use AVENT hand pump or Medela electric pump... even you don't feed BB by yourself... 應該可以keep到有奶...而唔會回奶...coz my friend's case--> so far don't feed by herself... but still can provide milk for 1 year wor...
個腰封是going out/in the office use... to fix the pelvis... and not pain when u're walking lor...
If you do not feel pain ... no need to make laaa...
your pair of twins are very good ar... 6 pounds+ and nearly 6 pounds... (I also hope my pair of twins like yours... >6 pounds each)... my elder son was 7 pounds 13 oz when he was delivered.